{"id":576,"date":"2008-08-07T11:31:10","date_gmt":"2008-08-07T09:31:10","guid":{"rendered":"http:\/\/jhoupier.free.fr\/?p=576"},"modified":"2020-12-03T14:58:25","modified_gmt":"2020-12-03T13:58:25","slug":"edvac","status":"publish","type":"post","link":"https:\/\/houpier.fr\/?p=576","title":{"rendered":"EDVAC"},"content":{"rendered":"<p>Maurice V. Wilkes et son \u00e9quipe de l&rsquo;universit\u00e9 de Cambridge mettent au point l&rsquo;EDSAC (Electronic Delay Storage Automatic Computer) bas\u00e9 sur le design EDVAC de Von Neuman. La m\u00e9moire d&rsquo;une taille de 512 mots de 17 bits \u00e9tait constitu\u00e9e de lignes \u00e0 retard au mercure. Les bits \u00e0 stocker \u00e9taient convertis en ondes ultrasoniques et \u00e9mis \u00e0 l&rsquo;extr\u00e9mit\u00e9 d&rsquo;un r\u00e9servoir de mercure. Ils \u00e9taient recapt\u00e9s \u00e0 l&rsquo;autre bout et r\u00e9emis. Seuls les bits sous forme \u00e9lectrique \u00e9taient accessibles. Ce syst\u00e8me \u00e9tait plus lent mais bien plus fiable que les tubes \u00e9lectrostatiques. La vitesse d&rsquo;horloge de la machine \u00e9tait de 0.5 MHz et les entr\u00e9es sorties s&rsquo;effectuaient par bande de papier. Le logiciel supportait le code relogeable au moment du chargement de chaque programme.<br \/>\n1949<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3071\" src=\"http:\/\/houpier.fr\/wp-content\/uploads\/2008\/08\/ord67_20060726_1623868323.jpg\" alt=\"\" width=\"230\" height=\"182\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Maurice V. Wilkes et son \u00e9quipe de l&rsquo;universit\u00e9 de Cambridge mettent au point l&rsquo;EDSAC (Electronic Delay Storage Automatic Computer) bas\u00e9 sur le design EDVAC de Von Neuman. La m\u00e9moire d&rsquo;une taille de 512 mots de 17 bits \u00e9tait constitu\u00e9e de lignes \u00e0 retard au mercure. Les bits \u00e0 stocker \u00e9taient convertis en ondes ultrasoniques et &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/houpier.fr\/?p=576\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;EDVAC&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[133],"tags":[],"class_list":["post-576","post","type-post","status-publish","format-standard","hentry","category-1940-1949"],"_links":{"self":[{"href":"https:\/\/houpier.fr\/index.php?rest_route=\/wp\/v2\/posts\/576","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/houpier.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/houpier.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/houpier.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/houpier.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=576"}],"version-history":[{"count":2,"href":"https:\/\/houpier.fr\/index.php?rest_route=\/wp\/v2\/posts\/576\/revisions"}],"predecessor-version":[{"id":3072,"href":"https:\/\/houpier.fr\/index.php?rest_route=\/wp\/v2\/posts\/576\/revisions\/3072"}],"wp:attachment":[{"href":"https:\/\/houpier.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/houpier.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/houpier.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}